<template>
  <el-container class="home-container">
      <!-- 头部 -->
    <el-header>
        <div>
            <img src="../assets/heima.png" alt="">
            <span>电商后台管理系统</span>
        </div>
        <button type="info" @click="logout">退出</button>
    </el-header>
    <!-- 主体 -->
    <el-container>
        <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <!-- 菜单 -->
          <el-menu background-color="#242e52" text-color="#fff" active-text-color="#4098FF"
          unique-opened :collapse="isCollapse" :collapse-transition='false' :router='true' :default-active="activePath">
              <!-- 一级菜单 -->
            <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
                <template slot="title">
                    <i :class="iconsObj[item.id]"></i>
                    <span>{{item.authName}}</span>
                </template>

                <!-- 二级菜单 -->
                <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                    <template slot="title">
                        <i class="el-icon-menu"></i>
                        <span>{{subItem.authName}}</span>
                    </template>
                </el-menu-item>
            </el-submenu>
          </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
          <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: 'Home',
  data() {
    return {
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 二级菜单激活状态
      activePath: ''
    }
  },
  created() {
    // 左侧菜单
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取左侧菜单栏
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
      // console.log('home-res',res);
    },
    // 点击按钮切换菜单折叠展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header {
  background-color: #2e2f36;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside{
    background-color: #242e52;
    .el-menu{
        border-right: none;
    }
}
.el-main{
    background-color: #EAEDF1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
